Krusty rode Apocalyptic in the Celebrity Harness race after the previous rider dropped out. It's odds where 1000-1.
Krusty gives the horse a cocktail of vitamins, caffenine, steroids and Xanax, which angered Fat Tony and led to Krusty running from mobsters and dodging bullets at a boy's birthday party.

The horse came last, taking seven minutes to finish, and afterwards, shows the crowd a "demonstration of healthy bowels".